package com.sky.controller.admin;

import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.result.PageResult;
import com.sky.result.Result;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.web.bind.annotation.*;

import javax.annotation.Resource;
import java.util.List;
import java.util.Set;

/**
 * 菜品管理
 */
@RestController
@Slf4j
@RequestMapping("admin/dish")
public class DishController {

    @Autowired
    private DishService dishService;
    @Autowired
    private StringRedisTemplate stringRedisTemplate;

    /**
     * 新增菜品
     * @param dishDTO
     * @return
     */
    @PostMapping
    public Result save(@RequestBody DishDTO dishDTO) {
        log.info("save dish {}", dishDTO);
        dishService.saveWithFlavor(dishDTO);

        // 清理缓存数据
        String key = "dish_" + dishDTO.getCategoryId();
        clearCache(key);

        return Result.success();

    }

    /**
     * 菜品分类查询
     * @param dishPageQueryDTO
     * @return
     */
    @GetMapping("page")
    public Result<PageResult> page(DishPageQueryDTO dishPageQueryDTO) {
        log.info("菜品分页查询： {}", dishPageQueryDTO);
        PageResult pageResult = dishService.page(dishPageQueryDTO);
        return Result.success(pageResult);
    }

    /**
     * 菜品批量删除
     * @param ids
     * @return
     */
    @DeleteMapping
    public Result delete(@RequestParam List<Long> ids) {
        log.info("菜品批量删除: {}", ids);
        dishService.deleteBatch(ids);

        // 删除缓存， 以dish_开头的缓存
        clearCache("dish_*");
        return Result.success();
    }

    /**
     * 根据id查询菜品
     * @param id
     * @return
     */
    @GetMapping("{id}")
    public Result<DishVO> getById(@PathVariable Long id) {
        log.info("根据id查询菜品：{}", id);
        DishVO dishVO = dishService.getByIdWithFlavor(id);
        return Result.success(dishVO);
    }

    /**
     * 修改菜品和对应口味信息
     * @param dishDTO
     * @return
     */
    @PutMapping
    public Result update(@RequestBody DishDTO dishDTO) {
        log.info("修改菜品：{}", dishDTO);
        dishService.updateWithFlavor(dishDTO);

        // 删除缓存， 以dish_开头的缓存, 牵扯到的数据太多太麻烦，操作次数并不多，影响并不大
        clearCache("dish_*");

        return Result.success();
    }

    /**
     * 修改起售状态
     * @param status
     * @return
     */
    @PostMapping("status/{status}")
    public Result startOrStop(@PathVariable Integer status, Long id) {
        log.info("修改起售状态：{}, {}", status, id);
        dishService.startOrStop(status, id);

        // 可以根据id查菜品属于哪个分类，拿到分类去删缓存
        // 删除缓存， 以dish_开头的缓存
        clearCache("dish_*");

        return Result.success();
    }

    /**
     * 根据分类id查菜品
     * @param categoryId
     * @return
     */
    @GetMapping("/list")
    public Result<List<Dish>> list(Long categoryId) {
        log.info("分类id:{}", categoryId);
        List<Dish> list = dishService.list(categoryId);
        return Result.success(list);
    }

    /**
     *  统一清理缓存数据
     * @param pattern
     */
    private void clearCache(String pattern) {
        Set<String> keys = stringRedisTemplate.keys(pattern);
        stringRedisTemplate.delete(keys);
    }
}
